Solution : https://service.sap.com/sap/support/notes/817854 (SAP Service marketplace login required)
Key words : 
snc-api calltime        tue nov 23 14, version     5rc          -7module      sncxx, sap gateway failedconnect_pm  gwhost=10, rfc-enabled function module, snc-enabled abap system, select snc-enabled, sap service marketplace, 58 2004release     640component   snc, terms rfc library, latest rfc library -
Related Notes : 
       
| 1452834 | |
| 834501 | CST patch collection 15 2005 | 
| 827986 | CST Patch Collection 12 2005 | 
| 413708 | Current RFC library | 
| 336693 | Replacing or installing librfc32.dll on Microsoft Windows | 
| 150699 | |
| 40024 | Transferring customer files to sapserv# using ftp |